<template>
  <div class="loginContainer">
    <div class="loginBox">
      <!-- 头像区域 -->
      <div class="avatarBox">
        <img src="../assets/logo.png" alt="登录头像">
      </div>
      <!-- 表单区域 -->
      <el-form ref="loginFormObject" label-width="0px" class="formContainer" :model="loginForm" :rules="loginRules">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input type="password" v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
        </el-form-item>
        <!-- 登录,重置 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>
<script>
export default {
  data () {
    return {
      // 表单数据对象绑定
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单验证规则绑定
      loginRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 10, message: '长度在 6 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置表单
    resetLoginForm () {
      this.$refs.loginFormObject.resetFields()
    },
    login () {
      this.$refs.loginFormObject.validate(async valid => {
        if (!valid) return
        var { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('用户名或者密码错误')
        this.$message.success({
          message: '登录成功',
          type: 'success',
          offset: 300
        })

        // 登录成功后要将token保存到sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        // 跳转到home页面
        this.$router.push('/home')
      })
    }
  }
}
</script>
<style lang="less" scoped>
.loginContainer {
  background: #2b4b6b;
  height: 100%;
}
.loginBox {
  width: 450px;
  height: 300px;
  background: #fff;
  border-radius: 5px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  /* 头像区域样式 */
  .avatarBox {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border: 1px solid #eee;
      border-radius: 50%;
      background-color: #ddd;
    }
  }
}
// 表单样式
.formContainer{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>
